Sometimes things are just good, and we don't need to make drastic changes to them. Some people are trying to take what works and change it. Don't ask me why. I don't totally understand it, but w/e.
Kettlebells made sense to me when they increased in popularity. But they've been around forever, it just happens that they hadn't had much exposure in the US yet.
On the other hand hula hoop exercise did not make sense, and thank god those gimmicky bastards weren't any better at marketing, I might've had an aneurism if the world actually accepted that as good exercise.
Core bars made some sense. I wouldn't call it a mainstay, useful everyday or something that's going to change your athletic career. But it's good.
The shack weight was so dumb.
I'll go over some of the things that should be mainstays soon. Feel free to share your reactions to this stuff in the comments.